Use numbers and pictures to show why a row with 6 smiley faces has one more than a row with 5 smiley faces.

do you have the measurements?

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!